Duchess Kate clenched her jaw and covered her face as Wales lost to Australia 15-6.

The couple are long supporters of Wales, as William is the vice patron of the Welsh Rugby Union, and the couple spent the first years of their marriage living in the U.K. country, on the north-west Welsh island of Anglesey.

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Duchess Kate Middleton and Prince William at Rugby

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Duchess Kate, Prince William get emotional for Wales at Rugby World Cup

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Australia v Wales match during the Rugby World Cup 2015 at Twickenham Stadium on October 10, 2015 in London, England. (Photo by Max Mumby/Pool/Indigo/Getty Images)

Catherine, Duchess of Cambridge attends the Australia v Wales match during the Rugby World Cup 2015 at Twickenham Stadium on October 10, 2015 in London, England. (Photo by Karwai Tang/WireImage)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Australia v Wales match during the Rugby World Cup 2015 at Twickenham Stadium on October 10, 2015 in London, England. (Photo by Max Mumby/Pool/Indigo/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Australia v Wales match during the Rugby World Cup 2015 at Twickenham Stadium on October 10, 2015 in London, England. (Photo by Karwai Tang/WireImage)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Australia v Wales match during the Rugby World Cup 2015 at Twickenham Stadium on October 10, 2015 in London, England. (Photo by Karwai Tang/WireImage)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Australia v Wales match during the Rugby World Cup 2015 at Twickenham Stadium on October 10, 2015 in London, England. (Photo by Karwai Tang/WireImage)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Australia v Wales match during the Rugby World Cup 2015 at Twickenham Stadium on October 10, 2015 in London, England. (Photo by Max Mumby/Pool/Indigo/Getty Images)

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Australia v Wales match during the Rugby World Cup 2015 at Twickenham Stadium on October 10, 2015 in London, England. (Photo by Max Mumby/Pool/Indigo/Getty Images)